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(No Model.) 2 Sheets-Sheet 1 J.'L.P. SPOONER. MOLD.

No. 443,339. Patented Dec. 23, 1890.

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2 Sheets-Sheet 2.

(No Model.)

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MOLD,

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Patented Dec. 23, 1890.

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k Ell/III \/\/iT EESEE- UNITED STATES PATENT OFFICE.

JOHN L. P. SPOONER, OF PROVIDENCE, RHODE ISLAND.

MOLD.

SPECIFICATION forming part of Letters Patent No. 443,339, dated December23, 1890.

Application filed May 31, 13 90- ToaZl whom it may concern:

Be it known that I, JOHN L. P. SPOONER, of Providence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Molds and Method of Making Same, of which thefollowing is a full, clear, and eXact description.

This invention consists of a mold constructed substantially ashereinafter fully described, for the manufacture more particularly ofseamless hollow or solid plated ingots'such, for instance, as aredescribed and shown in Letters Patent of the United States issued to me,dated January 7, 1890, and numbered 419,085 and the invention alsoconsists of the method of making such mold, all substantially ashereinafter fully described, reference being had to the accompanyingsheets of drawings, in which is illustrated a mold constructed inaccordance with this invention, and the method of making the same.

Figure 1 is a vertical central section of the mold in two parts. Figs.2, 3, and t are cross-sections on lines 2 2, 3 3, and 4 4, respectively,of Fig. 1. Figs. 5 and 6 are vertical central sections showing themanner of making the mold shown in Fig. 1. Fig. 7 is a cross-section online 7 7, Fig. 5. Fig. 8 is a cross-section on same line as Fig. 7, butwith the parts turned one-quarter round. Fig. 9 is a cross-section online 9 9, Fig.5; and Fig. 10 shows a vertical central section,to behereinafter referred to. Fig. 11 is a detail section of the lower end ofFig. 5.

In the drawings, A represents the mold made in two parts B and O, thepart B being in the shape of a cylinder having a vertical centralchamber D, open at its upper end, and a bottom E, the chamber being oftwo diameters, the portion F being of larger diameter than the portionG, the other part O of the mold being of tube form and open from end toend and adapted by its external diameter to fit in the upper chamber Fof the part B and held in place by a shoulder a, resting on its upperend, the two parts being made of a fire-resisting material, such as clayand plu n1- bago mixed with water, and molded into the proper shape whenin a moist condition, as will now be described.

In Figs. 5 to 10 is shown the manner of making the mold, and in thesefigures II is Serial No. 353,785. (No model.)

a shell or casing of cast-iron, havinga central vertical opening orchamber 1) through it from end to end, its internal diameter and shapebeing the same as the external'diameter and shape required for the mold.This shell or casing is square in cross-section on the outside, and overits upper end fits a cap or cover .I, also made of cast-iron, and whenin place it is secured by screws cl, passing through its sides andscrewing into the shell. The cap or cover extends up in neck form K to adesired height and has a central vertical passage 1 through it, whichwhen the cap is in place is vertically central over the chamberD of theshell.

Adapted to closely fit in the passage or openingf of the cap, but sothat it can be moved up and down therein,is a tube L of steel,havingsecured within it another tube M of steel, which extends below the tubeL a certain distance required in the manufacture of the mold, and whenplaced in the cap-passage f and moved down into the chamber D of theshell, the lower end 9 of the tube M should stop a short distance fromthe bottom of the shell according to the thickness desired for thebottom E of the part B of the mold, and when at the proper place thelower end h of the tube L rests upon a cross plug or bar N, dis posed ina transverse opening an in the shell, of the same thickness as thediameter of the tube L and of a width desired, the plug having anopening at through its width for the tube M to pass through it. Thedistance the tube M projects below the lower end h of the tube L isregulated by the height of the crossbar from the bottom of the shell togive the desired thickness of the bottom of the part B of the mold.These tubes L and M make the core for the shell, and in these views areshown as made in two parts, because it is easier to make them; but thetwo can be made as one having the two diameters and a shoulder 7a, orthe two can be connected together, as shown in Fig. 10, the tube Lhaving the tube M screwed into it at its lower end and a portion 0'screwed into its upper end to form a handle, or this portion may bedispensed with. \Vithin the tube or core M is a small rod or wire P, ofiron, long enough to extend down through the tube, to screw by its lowerend into a passage t in the bottom. of the tube, to close and open suchpassage when desired.

Inthelower endof thechamberof the shell is a block Q, closely fitting inthe same, but so it can slide up and down therein, and resting on aplate R, adapted to slide across the end of the shell in a dovetailgroove 11, and having an opening S through it.

In the preparation of the part ll of the mol d the block Q is insertedin the bottom of the chamber and the plate R slid into its place,forming a bottom for the chamber and hold ing the block in place, andthe cap secured in place over the end of the shell by its screws. Thefireresisting material, consisting of plumbago and clay, is then in anysuitable proportions mixed with water, and when in a moist and plasticcondition a suiiicient quantity to make the mold is put into the shellat its upper end and the core-tube inserted in the passage fin the capand pressed down firmly into the plastic material until the tube L restsby its end 71. on the cross-plug N, the lower portion M having passedthrough the opening a in the plug down nearly to the block or falsebottom Q, according to the thickness desired for the bottom of the mold.The whole is then allowed to stand until the fire-resisting material issufliciently set and hard, and then the wire or rod P is removed fromthe core-tube 31', leaving the opening '15 in the bottom of the core Mfree for air to pass through it into the chambcrof the molded material,when the core-tube is withdrawn, the cap taken off, which leaves theupper end of the shell free for the mold to be removed, which is done bytaking any suitable plunger and inserting it in the opening S in thebottom sliding plate R and pressing it firmly up against the block (Q,which forces it and the mold up through and outof the shell, it thenbeing left to dry and harden to be afterward baked, as usual, intoproper condition for use. The opening 2 in the bottom of the core-tubeafter the rod 1 is removed allows airto enter through the tube into thechamber of the mold below the core-tube as it is withdrawn, equalizingthe air-pressure on both sides of the mold and preventing any collapsingof the mold or injury to the same, as would otherwise happen if thecore-tube was solid and there was no opportunity for air to reach thespace in the mold-chamber below the core as it is being removed.

The operation of making the thimble or sleeve 0 is substantially thesame as making the mold proper, the cast-iron shell beingcorrespondingly shorter, and a solid core being used, dispensing withthe hollow one and the rod 1, as in making the sleeve, it being quiteshort, the core can be solid, all of which is shown in Fig. 6.

T is the cast-iron shell, having a central vertical chamber 0 of adiameter to correspond to the external diameter of the sleeve, andhaving a recess '20 in its upper end for the flange or shoulder a to fittherein, and

having a cap to be secured by screws, which can be the same one used forthe other part oithe mold.

LT is a steel rod to [it the passage 1' in the cap and neck, and V is anextension of the rod of less diameter and of a length to extend downinto the chamber 1 of the casingthe requircd distance, the rod V beingof a diameter corresponding to the internal diameter of the sleeve beingmolded. Theshell also has a block W to fit its chamber, having a centraldepression i for the lower end of the rod V to rest therein, and atransverse sliding plate R, fitting in a dovetail groove u, for theblock to rest on, and having an opening S through it.

In making the sleeve the block \V and sliding plate It are put in placeand the prepared moist and plastic material or theresisting materialplaced in the chamber of the shell of the quantity desired. Then the cap.is put in place and secured by its screws, the rod U inserted in theneck of the cap and pressed down through the same until its extension Vrests in the depression 2 in the block, which brings the lower end ofthe part U of the rod just at the top of the casing, pressing thefire-resisting material into its place round and about the core and intothe recess 20 in the shell, and when it is su liicientl y dry and set,the rod is taken out, the cap removed, and any suitable plunger or rodis inserted in the opening S in the sliding plate and pressed up firmlyagainst the block \Y, which forces theblock and molded sleeve up throughand out of the shell, which, being allowed to dry and harden, is bakedin the usual manner.

The manufacture of seamless plated ingots from a mold having athimble isdescribed and shown in the Letters Patent referred to, and thereforethere is no need of describing the same in this application, except tostate that the thimble in thisapplication is for the purpose of guidingthe core in the mold when casting the ingot, its internal diameter beingthe diameter of the core of the ingot, and the difference between itsinternal diameter and the diameter of the chamber of the mold being thethickness of the plating on the ingot. The shell or casing and its partsconnected therewith can be made of any suitable ma terial, but thematerial stated is practical and satisfactory in its results; also, theoutside of the shell can be made of any suitable shape desired; also,the mold can be made of any suitable lire-resisting material ormaterials.

This mold is applicable for molding other articles as well as seamlessplated ingots.

Having thus described my invention, what I claim is 1. A mold forcasting "seamless plated ingots or other articles, consisting of a shellor casing of fire-resisting material and a thimblc or sleeve offire-resisting material adapted to fit in the upper part of the shell orcasing as a guide for the core of the mold.

2. A mold for casting seamless plated ingots or other articles,consisting of a shell or casing of fire-resisting material and a thimbleor sleeve having a shoulder on its upper end made of fire-resistingmaterial adapted to fit therein, for the purpose specified.

3. The method of making a mold for making seamless plated ingots orother articles, consisting of first placing a fire-resisting material ina suitable chamber or mold, then pressing and molding it into shape byany suitable plunger or core, then removing a central portion of thecore to allow air to enter at the bottom of the chamber of the plasticmaterial as the body portion of the core is being removed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses. I

' JOHN L. P. SPOONER. \Vitnesses:

EDWIN W. BROWN, F. B. WENTWORTH.

